EDIFICI ACONCAGUA

  • by jordi llovera
  • /
  • 2015-06-29 12:47:13
  • /
  • International
  • /
  • 12296 / EN

Renovation

  • Building Type : Collective housing > 50m
  • Construction Year : 1982
  • Delivery year : 2011
  • Address 1 - street : meritxell 30 00500 ANDORRA LA VELLA, ANDORRA, Andorra
  • Climate zone : [Cfc] Marine Cool Winter & summer- Mild with no dry season.

  • Net Floor Area : 2 300 m2
  • Construction/refurbishment cost : 340 000 €
  • Cost/m2 : 147.83 €/m2

Proposed by :

Certifications :

  • Primary energy need :
    4.5 kWhpe/m2.year
    (Calculation method : )
Energy consumption
Economical buildingBuilding
< 50A
A
51 à 90B
B
91 à 150C
C
151 à 230D
D
231 à 330E
E
331 à 450F
F
> 450G
G
Energy-intensive building
​​

Reformed building with 27 apartments, applying energy efficiency criteria.

It’s situatedin an alpine zone.

The winter’s minimum temperature is -12°C.

Reduced heating consumption by 82%.

Acting on facade insulation and heating system: thermographic study, 15 to 20cminsulation, triple glazing LowE, blower door test, etc.

See more details about this project

 http://www.construction21.org/espana/case-studies/es/aconcagua.html
 http://www.construction21.org/articles/fr/low-energy-renovation-winner-2015-aconcagua-andorra.html

Data reliability

3rd part certified

Stakeholders

    Designer

    ENGINESA

    info@enginesa.ad

    architects and thermal engineering designer

Contracting method

Separate batches

Owner approach of sustainability

The goal was to have a building with passive house consumption, in Andorra with very low temperature in winter (-12ºC) for the first time.

Architectural description

Reformed building with 27 apartments, applying energy efficiency criteria.
It’s situated in an alpine zone.
The winter’s minimum temperature is -12°C.
Reduced heating consumption by 82%.
Acting on facade insulation and heating system: thermographic study, 15 to 20cm insulation, triple glazing LowE, blower door test, etc.

Building users opinion

Users are happy because their heating cost is very low and the comfort has increased.
Owner is happy too because he can grow up the price to rent the apartments, even if the users pays less than before (because the heating cost). He is happy too because he has a waiting list to rent their apartments.

Energy consumption

  • 4,50 kWhpe/m2.year
  • 55,00 kWhpe/m2.year
  • 130,00 kWhfe/m2.year
  • heating made by central heat pump. Consumption 4.5 kWh/m2/year
    hoot water production by heat pump. consumption 21 kWh/m2/year
    lighting 104.5 kWh/m2/year

  • 212,00 kWhpe/m2.year

Envelope performance

  • 0,24 W.m-2.K-1
  • Primary facade, U=0.24 W/m2/K
    Secondary facade U=0.34 W/m2/K
    Facade to neighbor U=0.27 W/m2/year

  • 2,90
  • n50

  • 2,40

Real final energy consumption

    130,00

    4,64

    2 013

Systems

    • Heat pump
    • Water radiator
    • Heat pump
    • No cooling system
    • Natural ventilation
    • No renewable energy systems
  • 100,00 %
  • solar gains control by blinds

Smart Building

    Control on/off, viewer of any parameter like temperatures, % opened of motorized valve, pump parameters (% velocity, flow, pressure, energy), instant and cumulated electrical and thermal energy consumption

    facility controlled by a Desigo Insight central control by Siemens

Product

    rockwool external pipe insulation 2x5cm each pipe

    exterior pipe insulation

    very good insulation with this thickness


    daikin heat pump

    Heat pump for heating low temperature (max 50ºC) and high efficiency COP between 2.84 to 3.77, ESEER 3.78.
    It works at proportional temperature to outdoor temp to achieve always maximum COP.

    We use with this heat pump, existing old radiators (high temperature and high emission) to heat this buiding after refurbishment, working at low temperature and low emission.


    daikin altherma for DHW

    High temperature heat pump to produce domestic hot water (DHW)

    Produces low cost hot water. No problems


    grundfos magna 3 for heating and DHW

    Electronic pump with connection to BMS control system, data transmission: pressure (bar), flow (m3/h), instant consumption (W), cumulate consumption (kWh), thermal flow (kWh).
    Working at constant temperature function (hot water production) or at constant pressure function (for heating facility)

    Sometimes the pump stops without any order

Construction and exploitation costs

  • 35 000,00
  • 22 000
  • 340 000
  • 30 000

Urban environment

Building in Andorra la Vella down town, shopping zone

Land plot area

350,00 m2

Built-up area

100,00 %

Parking spaces

18

Building Environmental Quality

  • acoustics
  • comfort (visual, olfactive, thermal)
  • energy efficiency
  • renewable energies

Contest categories

Low energy renovation

Low energy renovation

Green Building Solutions Awards 2015


Author of the page

  • jordi llovera

    Director de proyectos sostenibles


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    Contest

    Green Building Solutions Awards 2015